Hippolite levassetje



RFEERS, PHOTO-LITHOGRAPHER. WASHINGTON, C.

tuned snee wHIPPOLITE LEVSSEUR, 'OF BROOKLYN. NEW- YORK.

Letters Patent No. 98,171, dated December 21, 1,869.

The Schedule referred to in these Letters Patent and making part of the same TJ all whonm't 07mg/ concern Be it known that I, HIPPoLrrn LEvAssnUn, of Brooklyn, in theoouuty of Kings, in the State of New York, have kinvented certain Improvements in Steam-Valves, of which the following is a. specification. f i

The iirst part of' my invention relates to the arrangement of an inclined part on the valve-stem, tittiug into a corresponding part of the valve-shell, in combina-tion with the lower part of the gland, whe'reby a self-tightening packing for the valve-stem is obtained, the object of .which isto'dispense wit-h all` other description of packingfaud at the same time to reduce the iiictiou.

The second part of `my invention relates to the combination of a pin o1"projection' ywith the gland, or with a projection on saidgland, and with the handwheel or lever, which operates the valve, whereby the exact amount of opening of the valve can readily be seen.

ln the accompanying drawings- Figure I represents a longitudinal section of va steam-valve embodying my invention.

Figure Il represents a section of a steam-valve, embodying 'my invention, withv the ,valve didercntly arranged. l

Sinnlar letters represent similar parts.

A is the valve-shell, and

B, the valve, opening, in Fig. I, downward, and in Fig. II, upward.

To this valve a boss, C, is attached, made either square, orv any other suitable shape, and fitting into a. corresponding recess, D, either in the bottom plug E, as in Fig. I, or in the cover F, as in Fig. Il, and whereby the valve is prevented from turning while being moved upward or downward.

Into this boss C, the valve-stem G screws, for the purpose of raising or lowering` the valve.

0n the valve-stein G, a collar, n, is provided, the lower part of which is made hevelliug, and' ground tight upon va corresponding seat in the top of the valve-shell, as in Fig. I,-or in the cover F, as in rig. 11.

Upon this collar u., the gland-J is screwed, the

lower end of which is made bevelling, fitting into a corresponding recess in the upper side of the collar n, and forming, thus, a perfectly tight joint or packing, when in its place, without the use of' any other packing-material.

HOH

To the top of the gland J, a projecting tube, m, is fastened, or forms a part of the same, having, on its outside, a screw-thread cut, upon which a uut or collar, w, is fitted to work freely.

Into this nut or collar w, a pin, N, is securely fastened, entering a hole in the wheel H, or in lthe hau-v I die, fast on the top of the stem4 G, and through which the valve is operated. A l

In the nut or collar iv, asmall clutch-piece, o, is inserted, acted upon hy a spring ou its back, or by al set-screw, to lock this nut or collar w against the tube m, in any position, and prevent, thereby, the valvestem G, and consequently the valve, from moving, as this nut or collar w is, through the pin N, connected with the wheel H astto the stem.

When the valve is opened, the nut or collar 'w moves upward, upon the screw-thread, ou the projecting tube on., attached to the gland J, through the pin N, which connects said collar w with the wheel H, and as the latter remains always in the same place, this pin N will project gradually above the surface of the wheel, indicating, thereby, the exact amount the valve has been opened.

Instead of the nut or collar w working upon the thread cut in thc t-ube m., and operating the piu N, as above described, a square thread may be out on said tube fm,.aud a-square head, made on the end of the pin N, to operate in this square screw-thread.` 'g

What I cla-im as my invention, aud desire to secure by Letters Patent, is-

1. The construction of the vaive-stem G,witl1 a collar, n, fitting into a corresponding seat, in combiy nation with the gland J, acting upon the top of said collar-fn, operating together in the manner and for the purpose described.

2. The arrangement and use of the piu N, operated through its collar w, or its equivalent, by a. screwthread, cut upon a projecting tube fast to the stationary gland J, and passing through thehand'le or wheel H, which operatesthe valve, the whole being combined and operating iu the. manner and for the pur.- pose specified.

3. The friction-clutch c, in the nut or collar 1v, acted .upon by a spring or set-screw, and operating in the manner and for the purpose set forth.

HIPPOLITE LEVASSEUR.

Witnesses:

JOHN J. SGHILLINGER, LOUIS STUMM. l 

